package com.lyp.lease.web.admin.service.impl;

import com.lyp.lease.common.minio.MinioProperties;
import com.lyp.lease.web.admin.service.FileService;
import io.minio.*;
import io.minio.errors.*;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.web.multipart.MultipartFile;

import java.io.IOException;
import java.security.InvalidKeyException;
import java.security.NoSuchAlgorithmException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.UUID;

@Service
public class FileServiceImpl implements FileService {
    @Autowired
    MinioProperties minioProperties;
    @Autowired
    MinioClient minioClient;

    @Override
    public String upload(MultipartFile file) throws ServerException, InsufficientDataException, ErrorResponseException, IOException, NoSuchAlgorithmException, InvalidKeyException, InvalidResponseException, XmlParserException, InternalException {

        boolean isBucketExists = minioClient.bucketExists(BucketExistsArgs.builder().bucket(minioProperties.getBucketName()).build());
        // bucket不存在先创建它
        if (!isBucketExists) {
            minioClient.makeBucket(MakeBucketArgs.builder().bucket(minioProperties.getBucketName()).build());
            minioClient.setBucketPolicy(
                    SetBucketPolicyArgs.builder()
                            .bucket(minioProperties.getBucketName())
                            .config(createBucketPolicyConfig(minioProperties.getBucketName()))
                            .build()
            );

        }

        // 文件路径：2025104/uuid-源文件名
        // 上传到minio就会变成，目录/文件名，比如2025104下的xxx.jpg
        String fileName = new SimpleDateFormat("yyyyMMdd").format(new Date()) +
                "/" +
                UUID.randomUUID() +
                "-" +
                file.getOriginalFilename();

        // // 存文件到bucket
        minioClient.putObject(PutObjectArgs.builder().bucket(minioProperties.getBucketName())
                .object(fileName)
                .stream(file.getInputStream(),file.getSize(),-1)
                .contentType(file.getContentType())
                .build());
        // 返回文件的url
        return String.join("/", minioProperties.getEndpoint(), minioProperties.getBucketName(), fileName);




    }
    private String createBucketPolicyConfig(String bucketName) {

        return """
            {
              "Statement" : [ {
                "Action" : "s3:GetObject",
                "Effect" : "Allow",
                "Principal" : "*",
                "Resource" : "arn:aws:s3:::%s/*"
              } ],
              "Version" : "2012-10-17"
            }
            """.formatted(bucketName);
    }
}
